---
name: "HTML::FormFu::Filter::Callback"
section: "3pm"
platform: "linux"
package: "libhtml-formfu-perl"
version: "2.07000-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/HTML::FormFu::Filter::Callback"
---

# HTML::FormFu::Filter::Callback(3pm)

filter with custom subroutine

## NAME

HTML::FormFu::Filter::Callback - filter with custom subroutine

## VERSION

version 2.07

## SYNOPSIS

```
    $field->filter({
        type     => 'Callback',
        callback => \&my_filter,
    });
    ---
    elements:
      - type: Text
        name: foo
        filters:
          - type: Callback
            callback: "main::my_filter"
    sub my_filter {
        my ($value) = @_;
        # do something to $value
        return $value;
    }
```

## DESCRIPTION

Filter using a user-provided subroutine.

## METHODS

### callback

Arguments: \\&code-reference

Arguments: "subroutine-name"

## AUTHOR

Carl Franks, `"cfranks@cpan.org"`

Based on the original source code of HTML::Widget::Filter::Callback, by Lyo Kato, `"lyo.kato@gmail.com"`

## LICENSE

This library is free software, you can redistribute it and/or modify it under the same terms as Perl itself.

## AUTHOR

Carl Franks \<cpan@fireartist.com\>

## COPYRIGHT AND LICENSE

This software is copyright (c) 2018 by Carl Franks.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.